Simplify 5a - 3b - a + 2b

4a - b

To simplify the expression 5a - 3b - a + 2b, you can combine like terms.

The like terms are the ones that have the same variable(s) raised to the same power(s).

Here, the like terms are the terms that involve the variable 'a' and the terms that involve the variable 'b'.

So, let's combine the like terms:

Combining the 'a' terms: 5a - a = 4a

Combining the 'b' terms: -3b + 2b = -b

Now, we have 4a - b as the simplified expression.